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--= What's a DataPack? What's a Resource Pack? What's the differrence? =--
Datapack
Datapacks are server side and only modify the world. They function like upgraded one command blocks, with more features and better optimization.
To install a datapack you put it into the world's files; <world>
/datpacks
or in 1.16 you're able to add DataPacks during the creation of the world.
Once the datapack is in the world nobody else needs to install it.
Resourcepack
Resourcepacks are client side and modify things like Textures, Models, Languages, Sound, and things like that.
Resourcepacks are installed per person in %appdata%
/.minecraft
/resourcepacks
What's the difference? ... compare them yourself
(Copy and Paste Extract from Knowledge Base: https://discord.gg/xpNJdH9) (Raw Paste & More https://github.com/SheepCommander/KnowledgeBase/tree/main/1.16.4/faq/dp-rp-explained)